Saw



R. M. DUNHAM Jan. 11, 1938.

SAW

Filed Nov. 16, 1956 2 Sheets-Sheet l 2 Sheets-Sheet 2 R. M. DUNHAM SAWFiled NOV. 16, 1936 Jan. 11,1938.

w ii. I

Patented Jan. 11, 1938 UNITED STATES Pafriairr OFFICE SAW Robert M.Dunham, Houston, Tex., assignor to Brown & Root, 1110., Houston, Tex., acorporation of Texas Application November "16,1936, Serial No: i10,982 2Claims. (01.14343) This invention relates to a saw and has particu-. larrelation to that type of saw specially designed for felling trees.

It is an object of the invention to provide a saw, of the characterdescribed which islmounted in a novel manner on a motor vehicle and, theinvention includes means whereby the saw may be,

driven from the vehicle motor.

It is another object of the invention toprovide a saw support anddriving means so mounted on the frame of the motor vehicle that the sawmay be readily elevated or swung horizontally to the end that it may bereadily applied to the work,

will be of sturdy construction and yet will possess the requiredflexibility to accomplish :the purposes intended.

Another object of the invention is to provide, in,

adevice of the -character described, a saw supporting and driving meanswhich embodies two gear casings rigidly connected together and one ofwhich is mounted on the vehicle frame to pivot on a horizontal axis andto the other of which the main driving shaft and its housing areconnected so as to swing on an approximately vertical axis, theconstruction thus provided being very pensively produced and readilykept in repair.

With the above and other objects in view'the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example of which is given in this specificationand illustrated in the accompanying drawings, wherein:

Figure 1 shows a side view of the saw and its supporting and drivingmechanism shown mounted on the front end of the motor vehicle. Figure 2shows an enlarged fragmentary plan view, partly in section.

Figure 3 shows a vertical sectional view of a gear casing employed,showing the gearing" mounted therein,

Figure 4 shows a sectional view of said casing taken on the line 4-4 ofFigure 2 and Figure 5- shows an end view of a cable winding drum em- 1ployed.

Referring now more particularly to the drawings, wherein like numeralsof reference desig-- hate similar parts in each of the figures, thenumeral l designates a motor vehicle asa whole having a frame formedwith side members 2.

At the forward end of the frame and secured thereto there is a cross bar3, extending forwardly from which are the channels 4, 4, which arespaced the required distance apart and secured to the inner sides ofwhich are the bosses 5,],5.

. rear end of the main driving shaft 24.

' the upper and lower cover plates 30 and 3|.

There lsa substantially circular gear casing 6 .having the end covers I,l enclosing said casing -and whose outer ends are extended and tubularand'forme'd with the bearings 8, 8, to receive saidboss'es. ,The casingcovers I terminate in the annular flanges 9, 9 which bear against theinner sides of the channels 4. c

- A horizontal shaft l extends through the cas ing thus formed and thebosses and the channels 4 are provided with suitable bearings to receivesaid shaft. The shaft is also equipped with suitable antifrictionbearings II, II.

Fixed on the shaft l0 and enclosed by said casing there is abevel'driving gear I2 which is in mesh with a driven pinion I3 alsoenclosed by said casing.

The shaft '0 is confined against lengthwise 'm'ovenients-by means of thecollars I 4, M which are fastened to the shaft on opposite sides of thechannels 4. The shaft I0 is extended laterally and has a belt pulley l 5fixed thereon over which the'mlt l6 operates. This belt is driven fromav suitable-power'take off which is operatively connected with anddriven from the motor of the vehicle. strong and durable and one whichcan be inex- The extendedend of the shaft I0 islsupported by and isrotatably mounted in suitable bearings 17,18 which are carried by-themain frame of the vehicle,

The pinion I3 is fixed, on the rear end of a stubshaft l9 which extendsforwardly from the casing 6. Fixed on the forward end of the shaft 3 l9there is a pinion 20 which is in mesh with and drives the bevel gearwheel 2|. This bevel gear wheel is fixed on a vertical shaft 22and is inmesh with and drives a pinion '23 which is fixed on the The transmissionincluding the gears 20, 2| and 23, is inclosed in a transmission casing25 which includes the upper and lower covers 26, 21. The upper and lowerends of the shaft 22 are mounted on -anti-friction bearings 28, 29 whichare located in said' covers. These covers are extended and the outerends are formed tubular and closed by The rear-end of the transmissioncasing 25, is formed with a tubular extended sleeve 32, which terminatesin an external annular flange 33 and fastened to-theforwar-d endof thecasing B is the sleeve34 which may be detached from the casing and whoseforward end terminates in an external annularfflange 35'. Between theflanges 33, 35

there is an annular partiticn plate 36 which has a central bearing forthe shaft IS. The flanges 733, 35 are, secured togetheriby the bolts 37which lower flanges of the rings 40, 4|.

by means of the rings 40, 4|, formed of angle irons which are fittedtherearound' as more accurately shown in Figure 3 and whose flanges restagainst the outer margins of the covers 26, 21 and overlap the peripheryof the casing 25. Said rings 40, 4|, covers 26, 21 and the casing 25 aresecured in assembled relation by means of the bolts 42. Upper and lowerannular plates 43, 44,

are fitted over the tubular ends of the covers 26;

21 and are secured together by means of the long clamp bolts 45 and restagainst the upper and This provides a very sturdy construction for thetransmission casing. A

The forward endof the transmission casing is cut away, providing anopening 46.

There is a tubular bearing sleeve 41 which is extended through saidopening and whose inner end has the oppositely arranged anchors 48, 48to which the opposing arcuate guides 49, 49 are attached. These guideswork grooves 53, 5B of the casing 25.

The forward end of the bearing sleeve is formed with an external annularflange 5| and within said sleeve there is an antifriction bearingassembly 24a for the shaft 24. A- tubular shaft housing 52 surrounds theshaft 24 and its rear end is formed with an external annular flange 53.Between the flanges 5|, 53, there is an annular partition plate 54having a central bearing for the shaft 24. This plate 54 abuts the outerend of the bearing assembly 24a and said plate plained, the transmissioncasing 25, together with the shaft 24 and its housing 52 may swing in avertical plane about the axis of the shaft ill].

The shaft 24 and its housing are extended forwardly the requireddistance and fastened on the forward end of the shaft 24 there is apinion 56- which is in mesh with and drives a bevel gear wheel 51. Thisgear wheel 51 is fastened on the sawshaft 58 and the gears 56, 51, areinclosed in a suitable housing designated generally by the numeral 59and which is securely attached to the forward end of the housing 52 asmore accurately shown in Figure 1. A circular saw 60 is suitably securedto the lower end of the shaft 58. The sawmay be swung laterally to beapplied to the work by means of a suitable handle 6| which is attachedto the housing 59.

Mounted on the framework of the vehicle I there is an A-frame 52 whoseupper end carries a tackle block 63. The housing 59 is provided with alink 64 to which a clevis'65 is connected and a lower tackle block 56 isattached to the clevis 65 by means of cable 61. A flexible line 68 hasone end connected to the eye 63, carried by the end plate 30 and thisline is threaded through the sheaves of the tackle block 63, 66 and itsother end is wound around the'drum 10 suitably located on the vehicleframe and operable by a in the insideworm gearing 1| which may be turnedby a crank 12 to wind up or release the cable 68. v

The saw 60 may thus be elevated or lowered in an obvious manner and maybe swung laterally as desired by means of the handle 6|.

The saw hereinabove described has been particularly designed for cuttingsmall timber in the process of clearing land but may be used also forcutting trees of relatively large dimensions by increasing the diameterof the saw 60. The saw has been arranged forwardly of the transportingvehicle so that the timber may be readily reached and a passagewaycleared for the forward movement of the vehicle as the work progresses.

It is obvious that certain mechanical changes may be made. withoutdeparting from the principle of the invention. The drawings anddescription, therefore, are intended to-disclose What is now consideredto be a preferred form of the invention by way of illustration onlywhile the broad principle of the invention will be defined by'theappended claims.

What I claim is:

1. A sawing machine comprising a motor vehicle having a frame, spacedanchors extending forwardly from the frame, gear casings, rigidlyconnected together, said anchors and one of the casings being provided,one with bosses and the other with bearings to receive said bosseswhereby said casings are mounted on the frame to pivot about ahorizontal axis, gearing in said casings, a power take off from themotor vehicle operatively connected with said gearing to drive the same,a driven shaft mounted to swing in an approximately common plane withsaid axis, a shaft housing about said shaft and swingable therewith, abearing sleeve to which the shaft housing is connected, guides on saidsleeve and working in the other casing and forming a connection betweenthe sleeve and casing, a gear housing on the outer end of the shafthousing, a saw shaft mounted to rotate in the bearings in the gearhousing, gearing in the. gear housing operatively connecting said shaftswhereby the latter is driven from the former and a circular saw on thesaw shaft mounted to rotate in a plane approximately parallel withthedriven shaft.

2. A sawing machine comprising a motor vehicle having a frame, spacedanchors extending forwardly from the frame, gear casings rigidlyconnected togethei,,said anchors and one of the casings being providedwith means whereby said casings are mounted on the frame to pivot abouta horizontal axis, gearing in said casings, a power takeoff from themotor vehicle operatively connected with said gearing to drive the same,a driven shaft mounted to swing in an approximately common plane withsaid axis, a shaft housing about 'said shaft and swingable therewith, abearingsleeve to which said shaft housing is connected, guides on saidsleeve in working relation with the other casing and forming a.connection between the sleeve and its casing, a gear housing on theouter end of the shaft housing, a saw shaft mounted to rotate inhearings in the gear housing, gearing in the gear housing operativelyconnecting said shafts whereby the latter is driven from the former anda saw on the saw shaft mounted to rotate 'in a plane approximatelyparallel to the driven shaft.

ROBERT M. DUNHAM.

